Coin slot guard



FIG. 1 is a front elevational view of a coin slot guard showing my new design, the broken line showing of a face plate for a telephone is for illustrative purposes only and forms no part of the claimed design;

FIG. 2 is an inverted left side, bottom and rear perspective view thereof;

FIG. 3 is a right-side elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a coin slot guard, as shown and described. 